634 PROCEEDINGS OF THE AMERICAN ACADEMY 



ACAMPTOPAPPUS, Nov. Gen. 



Capitulum homogamum, 12 — 30-florum. Involucrum hemisphaari- 

 cum ; squamis imbricatis triserialibus concavis appressis coriaceo-char- 

 taceis obtusissimis margine scarioso eroso-fimbriolato limbatis sub apice 

 macula viridula notatis caeterum albidis, extirais orbicularis, intimis 

 oblongis. Receptaculum subconvexum alveolatura, alveolis fimbril- 

 latis. Corolla? infundibuliformes, limbo 5-lobo. Antherae Asterinea- 

 rum. Styli rami complanati, appendice triangulari-subulata hirtella 

 terminati. Achenia turgido-turbinata, sericeo-villosissima (sub lana 

 'eviter 5-nervia). Pappus paleaceo-setosus, nempe, ex aristis setisve 

 numerosis, 12 - 18 validioribus (achenio corollaeque aequilongis) com- 

 planatis subclavellatis, creteris brevioribus gracilioribus. — Suffrutex 

 ramosissimus, angustifolius, glaber, capitulis subcorymbosis, floribus 

 luteis. 



A. sph^erocephalus. Aplopapptis (Acamptopappus) spkcero- 

 cephalus Gray, PI. Fendl. p. 76 ; Torr. in Pacif. R. R. Expl. 7, 

 p. 12, t. 6. 



Lessingia Cham, is a well-marked but very peculiar genus, which 

 Mr. Bentham might perhaps have placed near to Hinterhubera, had 

 he been aware that only the original species has yellow flowers. The 

 other four are indeed homochromous, but cyanic, and also homoga- 

 mous. Moreover, even L. Germanorum is not truly heterogamous ; 

 the anthers of the marginal flowers being present, and, I believe, com- 

 monly polleniferous. The flowers, at least in L. leptoclada, the only 

 one I have seen in the living state, have a peculiar Centaurea-like 

 aspect quite unlike anything Asteroideous ; yet I should still maintain 

 that it is more nearly related to Corethrogyne than to any other genus 

 known to me. This relationship is manifested in the attenuated anther- 

 tips, as well as in the style-branches, achenia, foliage, involucre, etc. 

 From Bentham's notes : " Species 4 California? Mexicique incola?," and 

 " Achoenia glabra v. sericea," one may suppose that there is a Mexi- 

 can species, still undescribed, which has glabrous achenia. These are 

 silky hairy in all the Jive described species. 



Aplopapptts. No doubt the name should have been written Hap- 

 lopappus ; but as Cassini in founding the genus dropped the aspirate, 

 and De Candolle followed him, it seems hardly necessary to go with 

 Endlicher and Bentham in restoring it. The genus, like its analogue 

 Aster, comprises very diverse forms, too intimately and variously con- 

 nected to warrant the generic separations which have been attempted. 



